Epic Systems LeetCode Questions
15 questions all-time · 3 easy · 11 medium · 1 hard
| # | Problem | Difficulty | Frequency | Acceptance |
|---|---|---|---|---|
| 1 | Additive Number String, Backtracking | Medium | 100 | 0.3% |
| 2 | Letter Combinations of a Phone Number Hash Table, String, Backtracking | Medium | 90 | 0.7% |
| 3 | Spiral Matrix Array, Matrix, Simulation | Medium | 90 | 0.6% |
| 4 | Self Dividing Numbers Math | Easy | 85 | 0.8% |
| 5 | Valid Parentheses String, Stack | Easy | 84 | 0.4% |
| 6 | Stepping Numbers Math, Backtracking, Breadth-First Search | Medium | 82 | 0.5% |
| 7 | Angle Between Hands of a Clock Math | Medium | 71 | 0.7% |
| 8 | Word Search Array, String, Backtracking, Depth-First Search, Matrix | Medium | 68 | 0.5% |
| 9 | Bulls and Cows Hash Table, String, Counting | Medium | 57 | 0.5% |
| 10 | Two Sum Array, Hash Table | Easy | 57 | 0.6% |
| 11 | Count Primes Array, Math, Enumeration, Number Theory | Medium | 57 | 0.4% |
| 12 | Palindromic Substrings Two Pointers, String, Dynamic Programming | Medium | 49 | 0.7% |
| 13 | Permutations Array, Backtracking | Medium | 49 | 0.8% |
| 14 | Longest Palindromic Substring Two Pointers, String, Dynamic Programming | Medium | 49 | 0.4% |
| 15 | Longest Increasing Path in a Matrix Array, Dynamic Programming, Depth-First Search, Breadth-First Search, Graph Theory, Topological Sort, Memoization, Matrix | Hard | 49 | 0.6% |
How to read this list
The tabs at the top split the questions by how recently people said they were asked in interviews. "Last 30 Days" is the past month, "Last 3 Months" is the past quarter, and so on. "All Time" is every question on record for this company.
Frequency is a score from 0 to 100 for how often a question showed up in that time window. A higher number means it came up more often, so the list starts with the most common questions first. Acceptance is the share of submissions that pass on LeetCode. Click any question to open it on LeetCode.